package demo4;

import demo3.Person;
import org.junit.Test;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * @description:
 * @author:Mr.Cat
 * @create:2021-11-29 22:29
 **/
public class OtherTest {
    @Test
    public void test1(){
        Class clazz = Person.class;

        //getConstructors():获取当前运行时类中声明为public的构造器包含父类
        Constructor[] constructors = clazz.getConstructors();
        for(Constructor c:constructors){
            System.out.println(c);
        }
        System.out.println();

        //获取当前运行时类中声明的所有的构造器不包含父类
     Constructor[] declaredConstructors = clazz.getDeclaredConstructors();
        for(Constructor d:declaredConstructors){
            System.out.println(d);
        }
    }

    /*
    获取运行时类的父类
     */
    @Test
    public void test2(){
        Class clazz = Person.class;

        //
        Class superclass = clazz.getSuperclass();
        System.out.println(superclass);

    }

    /*
    获取运行时类的带泛型的父类
     */
    @Test
    public void test3(){
        Class clazz = Person.class;

        Type genericSuperclass = clazz.getGenericSuperclass();
        System.out.println(genericSuperclass);

    }
    /*
    获取运行时类的带泛型的父类的泛型
     */
    @Test
    public void test4(){
        Class clazz = Person.class;

        Type genericSuperclass = clazz.getGenericSuperclass();
        ParameterizedType paramType = (ParameterizedType)genericSuperclass;

        //获取泛型类型
        Type[] actualTypeArguments = paramType.getActualTypeArguments();

//与下面同效果        System.out.println(actualTypeArguments[0].getTypeName());
        System.out.println(((Class)actualTypeArguments[0]).getName());
    }

    /*
    获取运行时类实现的接口
     */
    @Test
    public void test5() {
        Class clazz = Person.class;
        Class[] interfaces = clazz.getInterfaces();

        for (Class c:interfaces){
            System.out.println(c);
        }

        System.out.println();

        //获取运行时类的父类实现的接口
        Class[] interfaces1 = clazz.getSuperclass().getInterfaces();
        for (Class c:interfaces1){
            System.out.println(c);
        }
    }
    /*
  获取运行时类所在的包
   */
    @Test
    public void test6() {
        Class clazz = Person.class;
        Package pack = clazz.getPackage();
        System.out.println(pack);
    }
    /*
  获取运行时类的注解
   */
    @Test
    public void test7() {
        Class clazz = Person.class;
        Annotation[] annotations = clazz.getAnnotations();
        for(Annotation a:annotations){
            System.out.println(a);
        }
    }
}

